Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b79b516bc198c6da6f7faa4618c2d2eea95dd53fc88b528d298b0eb3c5429c95' 
  AND token = 'aVdmMcfctNS/JfY889Z225G0Pa6wlxePpI/1AALUv+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}